"We got a big player, a player that I can compare with what he was a few years ago because he worked with me a few months like four or five years ago. His development was very, very good.

"We think we have a player that is now a top player in Europe, has to prove it at the highest level. There is always this point of you have to prove it at the highest level and now he has to do it for Manchester United, he has to do it in Champions League matches, but I think he has amazing qualities.